$border-scales: 0px, 1px, 2px, 3px !default;

$border-directions: (
        '': 'border',
        'top': 'border-top',
        'right': 'border-right',
        'left': 'border-left',
        'bottom': 'border-bottom',
        'x': ('border-left', 'border-right'),
        'y': ('border-top', 'border-bottom')
) !default;

$border-styles: (
        'border-solid': solid,
        'border-dashed': dashed,
        'border-dotted': dotted,
        'border-double': double
) !default;

@include border-class('border', $border-directions, $border-scales);
@include style-class('border-style', $border-styles, true);